Regardless of how your vehicle is powered—whether it be an
internal-combustion engine or a battery pack powering an electric motor—most
powertrains have a common enemy: heat.

For Taipei-based XING Mobility, heat is a major concern for its
high-performance Miss R model as its battery cells need to rapidly discharge
to generate its maximum quoted output of 1,000 kilowatts (1,341-horsepower).

The more rapidly you discharge a battery, the more heat it generates—and
XING believes it has a solution to keep its fast-discharging battery pack
cool.

Instead of snaking coolant through lines and chambers within the battery
pack's case, XING is taking a wholly different approach by immersing its
cells in a non-conductive fluid with a high boiling point.

“The use of Novec Engineered Fluids to immersion-cool EV batteries is a
breakthrough application, addressing the critical performance needs of the
market in a new and disruptive way,” said 3M’s Michael Garceau to Charged
EVs.

XING's batteries take the form of 42 lithium-ion-cell modules that can be
put together to build larger battery solutions.

While XING plans to use the battery packs for its own vehicles, it said it
will also sell the battery solutions to other OEMs looking for energy
storage solutions.

READ MORE: Could water be the secret to faster electric-car battery
technology?

“The industrial vehicle market is primed for a conversion to electric
drivetrains due to functional needs, increasing emissions requirements and
public noise reduction,” said XING co-founder and CTO Azizi Tucker.

"The XING Battery System is an opportune solution for small- to
medium-volume vehicle makers, catering to a huge variety of shapes, sizes
and power requirements.”

XING also plans to offer other off-the-shelf components for fledgling EV
makers, such as torque-vectoring gearboxes, electric power kits, and
magnetorheological dampers.

Looking at the data sheet, Novec 7100 or HCFC-225 would be a better
choice than 7200.
https://multimedia.3m.com/mws/media/199819O/3mtm-novectm-7200-engineered-fluid.pdfNovec 7200 is flammable, while 7100 or HCFC-225 isn't. HCFC-225 has a
boiling point a few degrees below the cell electrolyte while 7100 has a
boiling point _just_ below that of the electrolyte in the cells.
(You would rather the coolant boil first, and remove the heat, than the
electrolyte, and cause the cells to vent.)

Not a new idea at all. It has been tossed around for quite some time.
Halotron (R123) was proposed for this exact propose awhile back. Other,
less ozone depleting, substances have been considered, but flammability
becomes an issue generally associated with low ozone depletion. However,
corrosion is an issue that has to be taken into account, but is often
forgotten until it makes itself painfully obvious. When you constrain
the coolant to passages, instead of covering the entire battery,
corrosion can be controlled by reducing the materials exposed to the
coolant.

The ideal solution is reducing the internal resistance of the cells,
which reduces the need for cooling and increases efficiency. That will
eventually be the optimal solution, I suspect.

In reply to this post by Electric Vehicle Discussion List mailing list

Breakthrough?
Utility transformers and even the Prius motors have been oil cooled for many years.
It might not have been applied to batteries until now, but that is not because it is new
technology, but simply because it was not necessary yet, even for Tesla.
Cor.

Regardless of how your vehicle is powered—whether it be an internal-combustion engine or a battery pack powering an electric motor—most powertrains have a common enemy: heat.

For Taipei-based XING Mobility, heat is a major concern for its high-performance Miss R model as its battery cells need to rapidly discharge to generate its maximum quoted output of 1,000 kilowatts (1,341-horsepower).

The more rapidly you discharge a battery, the more heat it generates—and XING believes it has a solution to keep its fast-discharging battery pack cool.

Instead of snaking coolant through lines and chambers within the battery pack's case, XING is taking a wholly different approach by immersing its cells in a non-conductive fluid with a high boiling point.

“The use of Novec Engineered Fluids to immersion-cool EV batteries is a breakthrough application, addressing the critical performance needs of the market in a new and disruptive way,” said 3M’s Michael Garceau to Charged EVs.

XING's batteries take the form of 42 lithium-ion-cell modules that can be put together to build larger battery solutions.

While XING plans to use the battery packs for its own vehicles, it said it will also sell the battery solutions to other OEMs looking for energy storage solutions.

READ MORE: Could water be the secret to faster electric-car battery technology?

“The industrial vehicle market is primed for a conversion to electric drivetrains due to functional needs, increasing emissions requirements and public noise reduction,” said XING co-founder and CTO Azizi Tucker.

"The XING Battery System is an opportune solution for small- to medium-volume vehicle makers, catering to a huge variety of shapes, sizes and power requirements.”

XING also plans to offer other off-the-shelf components for fledgling EV makers, such as torque-vectoring gearboxes, electric power kits, and magnetorheological dampers.